B1156 Code - Front Airbag Sensor RH Malfunction
Quick Answer
The Front Airbag Sensor (Right Side) circuit consists of the Airbag Sensor Assembly and Front Airbag Sensor RH. Common causes include Faulty Front Airbag Sensor (Right Side), Front Airbag Sensor harness is open or shorted, Front Airbag Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1156 indicates Front Airbag Sensor RH Malfunction.
- Common causes
- Common causes include Faulty Front Airbag Sensor (Right Side), Front Airbag Sensor harness is open or shorted, Front Airbag Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B1156 Description
What are the Possible Causes of the DTC B1156?
- Faulty Front Airbag Sensor (Right Side)
- Front Airbag Sensor harness is open or shorted
- Front Airbag Sensor circuit poor electrical connection
- Faulty Airbag Sensor Assembly
How to Fix the DTC B1156?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1156 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- B1156 Acura — Gauge Control Module Lost Communication With Combination Switch Control Unit
- B1156 Honda — Gauge Control Module Lost Communication With Combination Switch Control Unit
- B1156 Lexus — Front Airbag Sensor RH Malfunction
- B1156 Scion — Front Airbag Sensor RH Malfunction
- B1156 Toyota — Front Airbag Sensor RH Malfunction
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about B1156 Code
1. What does OBDII code B1156 mean?
B1156 indicates a malfunction in the front right-hand (RH) airbag sensor, which may impact the airbag system's ability to deploy correctly.
2. What are the common symptoms of code B1156?
The airbag warning light will likely illuminate, and the airbag system may be disabled or compromised.
3. What causes a B1156 code to appear?
It can be caused by a faulty front RH airbag sensor, damaged wiring or connectors, corrosion, or a failure in the airbag control module.
4. Can I drive my car with a B1156 code?
While the car may still be drivable, the airbag system may not function properly in a collision, posing a safety risk.
5. How do I diagnose the B1156 code?
Use an OBDII scanner to confirm the code, then inspect the front RH airbag sensor, wiring, and connectors for damage or corrosion.
6. Can a loose connector cause the B1156 code?
Yes, a loose or corroded connector to the front RH airbag sensor can trigger this code.
7. How do I fix a B1156 code?
Repairs may include replacing the faulty airbag sensor, repairing damaged wiring, or cleaning corroded connectors. In some cases, the airbag control module may need to be reprogrammed or replaced.
8. How much does it cost to repair a B1156 code?
Repair costs can range from $100 to $600 or more, depending on whether you need to replace the sensor or repair wiring.
9. Do I need to reset the code after repairs?
Yes, after fixing the issue, use an OBDII scanner to clear the code and check if the airbag warning light turns off.
10. Can a B1156 code trigger other airbag-related codes?
Yes, if the airbag system is compromised, additional codes related to other sensors or the control module may appear.
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